Display of Dialed Telephone Numbers on Seven Segment Displays | DTMF Projects

Model No. 166: This project is designed to display the dialed telephone number on seven segment display for better visibility. This project is based on the concept of DTMF (dual tone multi frequency). Every button on the key pad of a telephone generates a unique frequency when pressed. These frequencies are decoded by a DTMF decoder and the digital signals are fed to the microcontroller through buffer circuits.
For more information about this project, kindly visit http://www.edgefxkits.com/display-of-dialed-telephone-numbers-on-seven-segment-displays